1 files changed, 88 insertions, 0 deletions
diff --git a/video/filter/vf_dlopen.h b/video/filter/vf_dlopen.h
new file mode 100644
index 0000000000..962605ca28
--- /dev/null
+++ b/video/filter/vf_dlopen.h
@@ -0,0 +1,88 @@
+#ifndef VF_DLOPEN_H
+#define VF_DLOPEN_H
+
+// when doing a two-way compatible change, don't change these
+// when doing a backwards compatible change, bump minor version
+// when doing an incompatible change, bump major version and zero minor version
+#define VF_DLOPEN_MAJOR_VERSION 1
+#define VF_DLOPEN_MINOR_VERSION 0
+
+#if VF_DLOPEN_MINOR_VERSION > 0
+# define VF_DLOPEN_CHECK_VERSION(ctx) \
+    do { \
+        if (ctx->major_version != VF_DLOPEN_MAJOR_VERSION || \
+            ctx->minor_version < VF_DLOPEN_MINOR_VERSION) \
+            return -1; \
+    } while (0)
+#else
+// workaround for "comparison is always false" warning
+# define VF_DLOPEN_CHECK_VERSION(ctx) \
+    do { \
+        if (ctx->major_version != VF_DLOPEN_MAJOR_VERSION) \
+            return -1; \
+    } while (0)
+#endif
+
+// valid pixel format names:
+// "yv12": planar YUV, U and V planes have an xshift and yshift of 1
+// "rgb24": packed RGB24
+struct vf_dlopen_formatpair {
+    const char *from; // (LATER) can also be a name of a format class
+    const char *to; // if NULL, this means identical format as source
+};
+
+#define FILTER_MAX_OUTCNT 16
+
+struct vf_dlopen_picdata {
+    unsigned int planes;
+    unsigned char *plane[4];
+    signed int planestride[4];
+    unsigned int planewidth[4];
+    unsigned int planeheight[4];
+    unsigned int planexshift[4];
+    unsigned int planeyshift[4];
+    double pts;
+};
+
+struct vf_dlopen_context {
+    unsigned short major_version;
+    unsigned short minor_version;
+
+    void *priv;
+
+    struct vf_dlopen_formatpair *format_mapping;
+    // {NULL, NULL} terminated list of supported format pairs
+    // if NULL, anything goes
+
+    int (*config)(struct vf_dlopen_context *ctx);  // -1 = error
+    // image config is put into the in_* members before calling this
+    // fills in the out_* members (which are preinitialized for an identity vf_dlopen_context)
+
+    int (*put_image)(struct vf_dlopen_context *ctx);  // returns number of images written, or negative on error
+    // before this is called, inpic_* and outpic_* are filled
+
+    void (*uninit)(struct vf_dlopen_context *ctx);
+
+    unsigned int in_width;
+    unsigned int in_height;
+    unsigned int in_d_width;
+    unsigned int in_d_height;
+    const char *in_fmt;
+    unsigned int out_width;
+    unsigned int out_height;
+    unsigned int out_d_width;
+    unsigned int out_d_height;
+    const char *out_fmt;
+    unsigned int out_cnt;
+
+    struct vf_dlopen_picdata inpic;
+    char *inpic_qscale;
+    unsigned int inpic_qscalestride;
+    unsigned int inpic_qscaleshift;
+
+    struct vf_dlopen_picdata outpic[FILTER_MAX_OUTCNT];
+};
+typedef int (vf_dlopen_getcontext_func)(struct vf_dlopen_context *ctx, int argc, const char **argv); // negative on error
+vf_dlopen_getcontext_func vf_dlopen_getcontext;
+
+#endif